Rate Sensitive Blanking for Gyroscope Path Length Control
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Solution Overview
Problem
Existing methods for synchronizing blanking pulses in Ring Laser Gyroscopes (RLGs) are inadequate for higher inertial rates, as they fail to accurately time the blanking pulses relative to the zero rate, leading to disruptions in Path Length Control subsystems.
Innovation Solution
A method and system for rate-sensitive blanking that determines the angular rate of the gyroscope, detects zero rate occurrences of single beam signals, and generates blanker pulses based on this rate, ensuring the Path Length Control circuit suspends operation at the correct times, using inertial rate, dither amplitude, and dither frequency to predict blanker positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If hardware circuits are used to synchronize blanking pulses to dither angle peaks, then blanking is effective for low inertial rates, but the blanking pulse timing becomes inaccurate for higher inertial rates of several degrees per second or more
Solution Approach 1:
The patent implements dynamic adjustment of blanking pulse timing by continuously tracking the zero-rate position as it shifts with inertial rate. Instead of using a fixed synchronization method based on dither angle peaks, the system dynamically determines the actual zero-rate position and adjusts blanking pulse timing accordingly, making the system adaptive to varying inertial rates while maintaining timing accuracy
Solution Approach 2:
The system changes the timing parameter of blanking pulses based on detected zero-rate position. By monitoring the shift in zero-rate position relative to dither angle peaks and adjusting the blanking pulse timing parameter accordingly, the system maintains synchronization accuracy across different inertial rate conditions
Data Source
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AI summary
A method and system for rate sensitive blanking in a path length control circuit of a gyroscope is provided. The method comprises determining an angular rate of the gyroscope, detecting a zero rate of the gyroscope where one or more single beam signals occur, and determining one or more blanker positions based on the zero rate. A blanker pulse is generated at the blanker positions such that the path length control circuit suspends operation when the one or more single beam signals occur.